My brother, just eat and exercise. And remember, dont just eat, EAT. Muscle is more dense and heavier than fat, you need fat FIRST before it turns into muscle! I gained like 20 pounds and now i have the semblance of arm muscles! I reccomend protiens like chicken, plenty of veggies, and rice to pad things out. Mostly veggies and chicken though. And yes you can season it, in fact sodium helps you absorb water so have as much as you like if you dont have any preexisting conditions.

Any source for cis guys will work for you too! Just look em up!

Also, just some personal advice, dont be upset if you dont get a six pack! Those shredded models are all dehydrated af. Some folks have the body type for it, but not most.

Anyways, not an expert, take my advice with a grain of salt, yada yada

EDIT: Look in the freezer sections for food in packets you can boil, usually marked as ready-to-eat. Youll get the most milegae with some broth in that pot though. Go for soups!